The police on Saturday constituted a special investigation team (SIT) to probe the killing of Mahesh alias Attack earlier this week.
The SIT will be led by deputy commissioner of police (DCP), East, Deepak Saharan.
“DCP Deepak Saharan will lead the SIT that will probe the incident,” said commissioner of police Sandeep Khirwar.
The announcement came after the family of the slain gangster met Khirwar on Saturday seeking his intervention to expedite the probe.
Mahesh, 34, was shot dead by unidentified men outside his office near Jharsa Chowk on the Delhi-Gurgaon Expressway on Wednesday night.
He was in a Mahindra Scorpio when three men came in Mahindra XUV and fired more than 18 shots at him. He sustained eight bullet injuries in the shooting, according to the post-mortem report released on Thursday.
The police have also recovered the Mahindra XUV used by the unknown attackers in the shooting. The XUV was stolen from Sector 9 in August this year.
The police at the Sector 40 station registered a case against three unknown assailants under IPC sections 302 (murder) and 34 (common intention) and under sections of the Arms Act.
Mahesh, son of a former sarpanch of Jharsa village, was allegedly involved in over 21 cases of attempt to murder, extortion and snatching in Gurgaon.
His name was also allegedly mentioned in the diaries recovered by the police from slain gangster Sandeep Gadoli. His sister-in-law is a former councillor.
Police suspect that the murder could be a case of a personal or gang rivalry.
Sources said the SIT, apart from questioning the family, would also question some gangsters and history sheeters who are lodged behind bars